1、Automatic detection of NPN and PNP transistors, N‑channel and P‑channel MOSFETs, diodes (including double diodes), thyristors, triodes, resistors and capacitors. 2、Added boot voltage detection function, one-key operation, can automatically test the component pins and display them on the LCD. 3、Can detect the amplification factor and base of transistors, MOSFET protection diodes, etc. to determine the forward bias voltage of the emitter transistor. 4、The display uses LCD(128 x 64 characters), measuring gate threshold voltage and gate capacitance of MOSFET. 5、Higher test speed, within 2 seconds of valid component test, (except for larger capacitors, the measurement of large capacitance takes a long time, the 1 minute measurement time is normal). 6、Power consumption shutdown mode, less than 20 nA, automatic shutdown to avoid unnecessary waste, save battery energy, and improve battery life.